Telephone



W. C'. UDE.

TELEPHONE. APPLICATION HLE D AUG-1| I917.

1,327,41 2. Patented Jan. 6, 1920.-

3 SHEETS-SHEET 1-.

IN VEN TOR WILLIAM C UDE HITORNEYSA W. C. UDE.

TELEPHONE. 7 APPLICATION FILED Aue.1. I917.

Patented J an. 6, 1920 3 SHEFTS-SHEET 2- I luvsuron WILLIAMCUDE ay p /m a I I W W. C. UDE.

TELEPHONE.

APPLICATION FILED AUG-I. 1912.

Patented Jan. 6, 1920.

3 SHEETS-SHEET 3.

luvewron opW/LLIAMCUDE r W ATTORNEYS 11y turnedfso to UNITE Enron.

TELEPHONE.

Specification of Letters Patent.

Patented Jan. 6, 1920.

Application filed August 1, 1917. Serial No. 183,998.

To. all to ham it may concern:

Be it known that 1, WILLIAM C. Una, a

citizen of the United States, residing at West Haven, in the county of Newv Haven and State of Connecticut, have invented a new and useful Improvement in Telephones; and I do hereby declare the following, when taken in connection-withthe accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the'same, and which said drawings constitut'e'part of this application and represent, in-

Figure 1 a face View of atelephoneinstrument constructed in. accordance with my invention. I Y I Fig. :2 a transverse sectional view through the base, on an enlarged scale.

Fig. 3 a side view partly in section, of the upper end of the instrument.

Fig. 4: a reverse plan view of the base with the bottom plate removed and showing the switch mechanism in. the open position, indicating diagrammatically the circuits.

Fig. 5 a similar View with the talking circuit in the closed position. v

Fig. 6 a diagrammatical view illustrating a modified form or mechanism tor operating the switch and armature. I

This invention relatesto an improvement in telephones. In the operation of telephone systems,it is desirable that means should be provided so that in case thesubscriber leaves the talking circuit closed, the operator at the central station may beable to open that circuit and place the instrument inringin'g position. I a t 7 One object or this invention is to provide means whereby the operator at the central station, without additional ppamusjo mechanism, maybperate the switch atthe subscribers telephone to open-the talking circuit provided that should have been left closed, and so, that theoperator; at the'cntra-l station can place the subscribert's telephone in condition for receiving a call. @A runner objectof this invention [isfto so mount the transmitter that it may; bereadplace. the, receivef'at one side or the other, a'cclwording to the coirvenlence of thesubscriber. I

With these endsjiniewfmy invention consists in the construction hereinafter described and, particularly recited in the claims.

n illustrating my invention, I have the button 20 when through talking circuit is left closed; and should n ay apply' the shown it applied to a fixture of the desk type, comprising a standard 7 and base 8,

and instead of operating the switch by removing the receiver from a hook, the recelver 9 is arranged at the outer end of the arm 10 which is pivotally connected with a bracket 11 fixed to one side of the transmitter casing 12. The construction of the switch mechanism in the base will best be understood by describing the operation. hen the subscriber desires to call the central station, he presses a push-button 13 mounted in the base, which button is provided with a wedge-shaped collar 14 which engages with a switch plate 15 and moves the outenend of that plate 15 into engagement with a shoulder 16 formed on a latchplate 17 this movement of the switch plate closing the talking circuit and showing central that the talking circuit is closed. When central receives the signal, the operator applies energy which energizes a coil magnet lSin'the base drawing the armature 19 agalnst the magnet, said magnet belng 1n the talking c rcuit. hen the subscriber finishes talkmg, he presses a button 20 in the base, which button is provided with a wedge-shaped collar 21. adapted toengage with the latch 17 soasto force that latch out of engagement with the end of the switch plate 15 allowing that switch plate to snap back and open the talklng circuit,

leaving the instrument in the ringing posi- In'case the subscriber fails to press talking, the

ti on.

the operator discover that the talking circuit is closedand the line notin use,the operator Tremoves thoplug whichreleases the energy 1n the talking ,clrcuit, andthereby releases the armature 19 which snaps outward, so to speak, and causes a finger 22: attached to the armature to strike the latch plate 17 and DlOVQ- ll} out of 'engagei'nent with the switch plate 15, allowing that switch plate to 11love to theopen position, sothat the instrument is again placed 1n a rlnging condition. 1n

case {the subscribers instrument too far distant from the central station to operate on the talking energy,

ing that the subscriber has finished talking,

A. C. or ringingenergy,

10 5 the operator discoverwhich will actuate the armature 19 and cause 7 it to trip the latch. The introduction ofthe .ma net-ls into the talking circuit adds air impedance to that circuit to overcome which I preferably introduce a non-inductive resistance 23 which is controlled by the con tacts 2a and 25 which are brought together by an extension 26 on the armature 19 when the greater part of the work of the magnet has been accomplished. This circuit-closing contact may be operated from any convenient part of the armature. It maybe here noted that the armature is mounted on a spring 27 the tendency of which is to move it away from the magnets. Instead of using an electromagnet, as shown in Figs. l and 5 of the drawings, I may use the ordinary induction coil 28 as shown in Fig. 6; and instead of using two push-buttons 13 and 20, I may use a lever switch 29 to move the switch plate 15.

It will be apparent without illustration, that instead of using an induction coil, I may use the ordinary impedance coil, or any type of coil forming an electromagnet to actuate an armature, which when released will open the talking circuit.

It is obvious that this release device may be used in all telephones which have a switch or contact controlling the talking circuit. As shown in Fig. 1 of the drawings, the transmitter casing is mounted at the upper end of a standard and the receiver is pivotally connected with one side thereof. Some subscribers use the receiver on one side, and others on the opposite side. To provide for turning the receiver from one side to the other, I provide a plate 30 extending upward from a standard set, and this plate is formed with a round opening 31 to receive a boss 32 formed on the back of a transmitter casing 12, and this boss may be interlocked with the plate in any desired manner. As herein shown,I employ a disk 33 which is secured to the end of a boss 32 so as to prevent the withdrawal of the transmitter, and if desired, a spring washer 34L may be introduced between the disk 33 and the rear face of the plate 30 to provide for adjusting the necessary friction.

To limit the movement of the transmitter in one direction or the other, it is formed with a stop-shoulder 35, its rear face being cut away to form shoulders 32 adapted to engage with a stop 36 on the plate 30, the transmitter being thus permitted to make a half revolution. Preferably and as herein shown, the bracket 11 will be formed inte gral with the transmitter casing, the wires extending through this bracket and through the arm 10.

i It will thus be seen that the operator at central can restore the subscribers telephone to the ringing position without resorting toany mechanism apart from the mechanism usually employed in operating telephone systems.

I claim .1. In a telephone, the combination with ,coreenergized by the said a talking circuit, of a switch controlling the same, manual means for closing the switch, mechanical locking means for holding the switch in its closed position, a magnetized core energized by the talking circuit, and an armature released by the said core and co-acting with the said mechanical locking means when the talking circuit is opened at central, to open the talking circuit at the telephone.

2. In a telephone, the combination with a talking circuit, of a switch controlling the same, manual means forclosing the switch, mechanical locking means coacting directly with the switch for holding the switch in its closed position, manual means for releasing the locking-means to permit the switch to open the talking circult, and magnetic means operated by reducing the. current of the talking circuit for releasing the said mechanical locking means to permit the switch to open the talking circuit.

3. In a telephone, the combination with a talking circuit, of a switch controlling the same, a push-button for closing the switch, mechanical locking means coacting directly with the switch to hold the same in its closed position, a push-button to release the said mechanical locking means for permitting the switch to open, and magnetic means operated by reducing the current of the talking circuit for releasing the said mechanical locking means to permit the switch to open the talking circu t.

4. In a telephone, the combination with the talking circuit, of a switch for controlling the same, manual means for closing the switch, mechanical locking means for holding the switch in its closed position, a magnetized core energized by the said talking circuit, and an armature released by the said core by reducing the current of the talking circuit and operating when so released to operate the said mechanical locking means for releasing the switch for opening the talking circuit; I I

5. In a telephone, the combination with a talking circuit, of a switch for controlling the same, manual means forclosing'the switch, mechanical locking means for holding'the switch in. its closed position, a magnetized talking circuit, an armature released by the said core by reducing the current of the talking circuit, and a spring connected'with the armature and placed under tension by the operation thereof by the said core,

whereby when the talking circuit is opened and the armature is: released, the spring asserts itself to operate the armature for releasing the said mechanlcal locklng mechanlsm which inturn permits the switch to open;

6. In a telephone, thelcombination with a talking circuit, of a switch for controllin the same, manual means for closing thB SWltCh,

mechanical locking means co-acting directly with the said switch for holding the same in its closed position, a magnetized core energized by the talking circuit, and an armature released bythe said core by reducing the current of the talking circuit and operating when so released to operate the said mechanical locking means to release the switch for opening the talking circuit.

7. In a telephone, the combination with a talking circuit, of a switch controlling the same, manual means for closing the switch, mechanical locking means for holding the switch in its closed position, a magnetized core energized by the talking circuit, an armature released by the said core by reducing the current of the said talking circuit and operating when so released to operate the said mechanical locking means for releasing the said switch for opening the talkin circuit, and means to open the switch manna 1y.

8. In a telephone, the combination with the talking circuit, of a switch controlling the same, manual means for closing the switch, locking means for holding the switch in its closed position, a magnet energized by the talking circuit, an armature operated by the said magnet and adapted when released to operate the said locking means to release the switch, contacts brought together by the movement of the said armature, and a non-inductive resistance connected with the said contacts by the closing of which the current is shunted across the said magnet in the talking circuit.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

WILLIAM o. UDEQ Witnesses:

G. D. SEYMoUR, O. L. WEED. 

